After this you will have to accept the terms and agreement of HTC that it is not responsible if anything happens to your phone.Now you will get the steps of Unlocking the Bootloader or perform these in the same way

AND THEN CLICK PROCEED TO THE NEXT STEP.# Download the unlock_tools.zip file from here and extract it to a new folder in C:/Android/ (or select any short place like Desktop.)# Now open the folder where you have extracted the contents of unlock_tools.zip (in this case C:/Android/) and press and hold SHIFT on your keyboard and then RIGHT-CLICK on mouse and then select “Open Command Window Here“.

Their would be some combination of numbers and alphabets instead of the dots so just copy this code.When copying the token, start with this line:

<<<< Identifier Token Start >>>>And end with this line:

<<<<< Identifier Token End >>>>>Now paste the copied code in the Device Token Code as in the picture below:-http://htcdv.files.wordpress.com/2013/03/vlcsnap-2013-03-13-12h02m11s177.png.You will receive an email (the one with which you registered on HTC Website) in which there will be an attachment Unlock_code.bin. Save this file in the same folder in which there is adb,fastboot etc. (in this case C:/Android/ THE ONE THAT YOU EXTRACTED) and then type the following code in the command window:

fastboot flash unlock token Unlock_code.bin

After a while your phone will reboot saying your bootloader is Unlocked.Regards

Attachment Unlock_code.bin. Save this file in the same folder in which there is adb,fastboot etc. (in this case C:/Android/ THE ONE THAT YOU EXTRACTED) and then type the following code in the command window:

fastboot flash unlock token Unlock_code.bin

After a while your phone will reboot saying your bootloader is Unlocked.Regards